Tablet won't turn on after screen repair?


Aug 26, 2017
Hiya! My brother just got his Bush tablet back after a screen repair, he turned on the tablet and it was stuck on the bush logo for some time, then switched to the android optimising app screens, but was stuck on that for sometime too. he pressed the power and volume up buttons for a few seconds and it knocked off, but has not come back on. No charging screen appears while charging through a mains cable but when charged through a laptop the usb plugged/unplugged tones every few seconds or so. Any suggestions? Much appreciated!